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hearing aid S-520

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hearing aid S-520

hearing aid S-520

1.Max Sound Output: 126 ± 4dB 2.Max Gain: 50 ± 5 3.Harmonic Wave Distortion: ≤ 8% (AT 1000 Hz) 4.Input Noise: ≤ 28 dB 5.Frequency Range: 300Hz ~ 4000Hz 6.Working Voltage: 1.5V 7.Working Current: ≤ 6...

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